Answer:
The male's genotype is MmRrBb.
Explanation:
The dominant allele R causes solid tail color, and the recessive allele r results in white spots on a colored background.
The black coat color allele B is dominant to the brown allele b
But these genes can only be expressed if the animal has an mm genotype at a third gene locus. Animals that are M_ are yellow regardless of which allele from the B locus is present.
A mating between a solid yellow-tailed male yawn cat and a solid brown-tailed female yawncat
the offspring:
6 M_R_ solid yellow
2 M_rr spotted yellow
3 mmR_B_ solid black
1 mmrrB_ spotted black
3mmR_bb solid brown
1mmrrbb
Since the female's genotype is mmR_bb. To produce offspring with these varying genotypes; each parent contributes one copy each. Since the male is a solid yellow, we can say part of his genotype is: M_R_.
Among the offspring, there is the presence of the dominant B allele, thus we can assume his genotype to be: M_R_B_.
Among the offspring, we have those that express the black and brown colour and to get the brown colour (b), the two parents must possess a copy each of both the m that allows expression and b that allows for brown colour. Thus the male genotype is: MmR_Bb.
There are also spotted ones among that can express this trait when both parent possess one copy each of r allele. Thus the male's genotype is MmRrBb.
Thus the mating will be between MmRrBb and mmR_bb to produce those stes of progeny.